Beam-joist.



No. 669,639. Patented Mar. l2, I90I.

C. HESSEL &. W. SIPPEL.

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CURT HESSEL AND WALTHER SIPPEL, OF BER-LIN, GERMANY.

BEAM-JOIST.

SPECIFICATION forming part of Letters Patent No. 669,639, dated March 12, 1901.

Application filed December 24, 1900. Serial No. 40,905. No model.)

To all whom it may concern.-

Be it known that we, OURT HESSEL and WALTHER SIPPEL, citizens of the German Empire, residing at Berlin, Germany, have invented certain new and useful Improvements in Beam-Joists or the Like, of which the following is a description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This invention relates to wrought iron beams, joists, or the like of H or double-T section and formed in one piece by rolling. Compared with beams as made at present a beam constructed or formed to embody these improvements is considerably lighter, although its stiffness is not interfered with, its application to building purposes is simplified, and it may be more generally used, the cost of labor and material is considerably reduced and the cost of production is not increased.

The new beam is formed with perforations in its central web, which give to it the appearance of a ladder. These perforations do not extend flush with the flanges,sothat the height of the perforations is less than the height of the web. The web is strengthened by having its thickness increased, the thicker part commencing at an equal distance from both flanges. The height of the thickened part of the web is also greater than the height of the perforations.

The new wrought-iron beam is intended for use in cases where cast-iron beams could not be used and is of the greatest importance, as by its use the construction of buildings is considerably simplified, cost is reduced, and greater strength and stiflness are obtained.

Wrought-iron beams with perforations have already been used in machine or similar construction-as, for instance, in a locomotive for the purpose of obtaining a reduction in weight; but such beams consist of simple sheets or plates of wrought-iron, the perforationsin which have been produced by punching, cutting, or the like, and are bound to have the stiifness of the original simple plate considerably reduced. The beam which is the subject of this invention leaves the rolling still quite finished and ready for use.

In the accompanying drawings, Figure 1 is a perspective view showing the present beam.

Fig. 2 is a fragmentary side elevation thereof. Fig. 3 is a cross-sectional elevation on the line 3 3 of Fig. 2. Fig. 4 is a sectional plan view on the line at 4 of Fig. 2, and Fig. 5 is a perspective view showing beams of the present type in use.

Referring now more particularly to the drawings, the letter a indicates the perforations, the length of each of which is a multiple of the breadth of one of the remaining solid parts I) of the central web 61. The web 61 is of normal thickness where it joins onto the upper and lower flanges c c, said flanges extending upon each side of the web, thus producing an I-beam; but at a short distance from said flanges the thickness is increased, as at e, throughout the length of the beam.

The many uses to which the present beam can be put will be apparent. It is usefulin constructing ceilings, moldings, cornices, floors, due. The new beam may also be usefully employed as a lamp post or standard, as the top may be easily reached without a ladder.

In Fig. 5 is illustrated a portion of a floor construction in which the present beams are used, said figu re showing one set of the beams made of less height than the other in order that the beams of one set can extend through the perforations of the beams of the other set. This figure also shows the intimate manner in which the beams can be bound together.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is In a wrought beam-joist or the like, upper and lower flanges extending upon each side of the web, a web having its body portion thickened and provided with perforations therethrough, and short web-sections of less thickness than said web, said web-sections connecting said web with said flanges; substantially as described.

In witness whereof we have hereunto signed our names, this 28th day of November, 1900, in the presence of two subscribing witnesses.

GURT HESSEL. WALTHER SIPPEL.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

